Vieille test—

Loss of Weight Test, Marqueyrol s Test, Meerscheidt-Hullessem Test, Mittasch s Test, Obermiiller s Test, Pavlik s Test, Methyl Violet Test, Silvered Vessel Test, Simon Thomas Test, Spica Test, Sy Test, Taliani Test, Taylor s Test, Tomanari s Test, Vacuum Stability Test, Vieille Test, Warmlagermethode 75° (German Storage Test), Will Test... 

CDj) T. Urbanski, Vol 2(1965), pp 22-31 gives methods for determining the Stability of Nitric Esters, which include Abel Heat Test, Litmus Test (Vieille Test), Heat Test at 134.5°C, Silvered Vessel Test, Loss of Weight Test, Will Test, Bergmann Junk Test and Manometric Test... 

The Vieille test at a temperature of 110°C (Vieille [61]). For this a sample of powder is heated daily for 10 hr or until the litmus paper has assumed a standard red tint. The sample is then aerated for 14 hr and the procedure is repeated each day until the litmus paper reddens in one hour or less. The course of the test can be seen from a following example ... 

The advantage of the Vieille Test consists of the fact that when the propint is periodically exposed to the atmosphere, it can reabsorb moisture, which means that the decompn takes place under realistic conditions. The test is now much less frequently applied, ever since a propint manufd with pentanol as solvent, which had been tested by this method, had decompd on board two warships, which were sunk by the resulting expin in 1911. The Vieille test today is used only in Fr and Belg (Ref 6)... 

Vieille Test. See under VieiUe, Paul above... 

Litmus test (Vieille test). This test introduced by Vieille [88] consists in warming a sample of nitrocellulose (2.5 g) or smokeless powder in a hermetically sealed test tube (Fig. 2) in presence of a band of blue litmus paper inserted within the tube. The tube is kept in a thermostat warmed to 110°C. The temperature inside the test tube is 108.5°G In U.StS.R. the temperature of the thermostat is 106.5°C. The blue paper should not turn definitely red in less than 7 hr. 

Vibrometer 366 Vieille Test 179 366 Virial equation 120 viscosity of nitrocellulose 224 Visol Visol-1 -4 -6 = vinylethylether and mixtures with isopropylalcohol and vinylbutylether liquid rocket fuel (german)... 

Methods in which the escaping nitrous gases can be recognized visually or by noting the color change of a strip of dyed filter paper. The former methods include the qualitative tests at 132, 100, 75, and 65.5 °C (270, 212, 167, and 150 °F). These tests include the U.S. supervision test, the methyl violet test, the Abel test, and the Vieille test. 

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